<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>index</title>
    <link rel="stylesheet" href="./css/index.css">

    <script src="./js/index.js"></script>

</head>

<body>
    <a href="javascript:click()">sss</a>
    <input class="input" type="text" name="" id="">
    <button class="btn">点一下</button>
    <div class="result"></div>

    <a href="http://www.baidu.com">baidu</a>

    <br>
    <br>
    <form action="#" method="post">
        用户名:<input type="text" class="username" name="username">
        <div class="username-error" style="color: red;"></div>
        <br>
        密码:<input type="password" class="password" name="password">
        <br>
        <input type="submit" value="提交">
    </form>
</body>

</html>